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import { computed, nextTick, onBeforeUnmount, onMounted, ref, watch } from 'vue'
import { ChevronLeft, ChevronRight, X } from '@lucide/vue'
import { useRoute, useRouter } from 'vue-router'
import { useAppStore } from '@/stores/app'
import Button from '@/components/ui/button/button.vue'
import Dropdown from '@/components/ui/dropdown/dropdown.vue'
import { cacheKeyOf } from '@/utils/cacheKey'
const route = useRoute()
const router = useRouter()
const appStore = useAppStore()
const trackRef = ref(null)
const overflowed = ref(false)
const canScrollLeft = ref(false)
const canScrollRight = ref(false)
const activeKey = computed(() => route.fullPath)
const tabs = computed(() => appStore.visitedTabs)
// 路由变化自动添加页签（工作台固定不可关）
watch(
() => route.fullPath,
async () => {
const title = route.meta?.title
if (title) {
// cacheByKey 路由（如 /detail/:id）：每个 fullPath 一个独立组件名，
// 使 keep-alive 的 include 能按参数精确销毁其实例，且不同参数天然多个独立缓存。
const name = route.meta?.cacheByKey ? cacheKeyOf(route.fullPath) : route.meta?.componentName
appStore.addVisitedTab({
key: route.fullPath,
label: title,
closable: route.fullPath !== '/dashboard',
name,
})
}
await nextTick()
revealActiveTab()
updateScrollState()
},
{ immediate: true },
)
watch(
() => appStore.visitedTabs.length,
async () => {
await nextTick()
updateScrollState()
},
)
/* ---- 溢出检测（替代 @vueuse/core useResizeObserver） ---- */
let resizeObserver = null
onMounted(() => {
resizeObserver = new ResizeObserver(updateScrollState)
if (trackRef.value) {
resizeObserver.observe(trackRef.value)
// wheel 需要 preventDefault 阻止页面跟随滚动，显式声明 passive: false
// （隐式注册才会触发 Chrome 的 non-passive wheel 警告）
trackRef.value.addEventListener('wheel', handleWheel, { passive: false })
}
})
onBeforeUnmount(() => {
resizeObserver?.disconnect()
resizeObserver = null
trackRef.value?.removeEventListener('wheel', handleWheel)
})
function changeTab(key) {
if (key !== route.fullPath) router.push(key)
}
function closeTab(key) {
if (key === '/dashboard') return
const currentIndex = tabs.value.findIndex((t) => t.key === key)
const fallback = tabs.value[currentIndex - 1] ?? tabs.value[currentIndex + 1] ?? tabs.value[0]
appStore.removeVisitedTab(key)
if (route.fullPath === key && fallback) router.push(fallback.key)
}
/* ---- 右键菜单：刷新 / 关闭 / 关闭其他 / 关闭左侧 / 关闭右侧 / 关闭全部 ---- */
function tabContextItems(tab) {
const list = tabs.value
const idx = list.findIndex((t) => t.key === tab.key)
const hasClosableOthers = list.some((t) => t.key !== '/dashboard' && t.key !== tab.key)
const hasLeft = list.slice(0, idx).some((t) => t.key !== '/dashboard')
const hasRight = idx < list.length - 1
return [
{ key: 'refresh', label: '刷新' },
{ key: 'close', label: '关闭', disabled: !tab.closable },
{ divider: true },
{ key: 'closeOthers', label: '关闭其他', disabled: !hasClosableOthers },
{ key: 'closeLeft', label: '关闭左侧', disabled: !hasLeft },
{ key: 'closeRight', label: '关闭右侧', disabled: !hasRight },
{ key: 'closeAll', label: '关闭全部', disabled: list.length <= 1 },
].map((it) => ({ ...it, onClick: () => handleTabAction(it.key, tab.key) }))
}
// 批量操作后：若当前路由页签已被关闭，跳转到 fallback（右键项本身或工作台）
function afterClose(fallbackKey) {
if (tabs.value.some((t) => t.key === route.fullPath)) return
router.push(fallbackKey)
}
function handleTabAction(action, key) {
switch (action) {
case 'refresh':
refreshTab(key)
break
case 'close':
closeTab(key)
break
case 'closeOthers':
appStore.closeOthers(key)
afterClose(key)
break
case 'closeLeft':
appStore.closeLeft(key)
afterClose(key)
break
case 'closeRight':
appStore.closeRight(key)
afterClose(key)
break
case 'closeAll':
appStore.closeAll()
afterClose('/dashboard')
break
}
}
function updateScrollState() {
const track = trackRef.value
if (!track) return
const shouldOverflow = track.scrollWidth > track.clientWidth + 1
overflowed.value = shouldOverflow
if (!shouldOverflow) {
track.scrollLeft = 0
canScrollLeft.value = false
canScrollRight.value = false
return
}
canScrollLeft.value = track.scrollLeft > 1
canScrollRight.value = track.scrollLeft + track.clientWidth < track.scrollWidth - 1
}
function scrollTabs(direction) {
const track = trackRef.value
if (!track) return
track.scrollBy({
left: direction * Math.max(track.clientWidth * 0.6, 120),
behavior: 'smooth',
})
}
function revealActiveTab(behavior = 'smooth') {
const track = trackRef.value
if (!track || !track.isConnected) return
const activeElement = Array.from(track.querySelectorAll('[data-tab-key]')).find(
(element) => element.dataset.tabKey === activeKey.value,
)
// 元素未挂载（路由过渡/布局重建时可能短暂脱离 DOM，parentNode 为 null）则跳过，
// 避免 scrollIntoView 抛出未捕获异常向上冒泡成 Promise 拒绝。
if (!activeElement || !activeElement.isConnected) return
try {
activeElement.scrollIntoView({ behavior, block: 'nearest', inline: 'center' })
} catch {
/* 元素正处于卸载/过渡中，忽略 */
}
}
function handleWheel(e) {
const track = trackRef.value
if (!track || track.scrollWidth <= track.clientWidth) return
const delta = Math.abs(e.deltaY) >= Math.abs(e.deltaX) ? e.deltaY : e.deltaX
if (!delta) return
e.preventDefault()
track.scrollLeft += delta
}
function refreshTab(key) {
appStore.refreshRoute(key)
}
</script>
<template>
<div v-if="tabs.length" class="fms-tabs">
<!-- 左侧滚动按钮 -->
<Button
v-if="overflowed"
type="ghost"
class="fms-tabs-arrow"
:disabled="!canScrollLeft"
aria-label="向左滚动页签"
@click="scrollTabs(-1)"
>
<ChevronLeft />
</Button>
<!-- 页签轨道 -->
<div
ref="trackRef"
class="fms-tabs-track"
role="tablist"
@scroll.passive="updateScrollState"
>
<Dropdown
v-for="tab in tabs"
:key="tab.key"
trigger="contextmenu"
placement="bottom-start"
:items="tabContextItems(tab)"
>
<button
:data-tab-key="tab.key"
type="button"
role="tab"
:aria-selected="tab.key === activeKey"
class="fms-tab"
:class="{ 'is-active': tab.key === activeKey, 'is-closable': tab.closable }"
@click="changeTab(tab.key)"
@dblclick.prevent="refreshTab(tab.key)"
>
<span class="fms-tab-label">{{ tab.label }}</span>
<span
v-if="tab.closable"
class="fms-tab-close"
aria-label="关闭页签"
@click.stop="closeTab(tab.key)"
>
<X />
</span>
</button>
</Dropdown>
</div>
<!-- 右侧滚动按钮 -->
<Button
v-if="overflowed"
type="ghost"
class="fms-tabs-arrow"
:disabled="!canScrollRight"
aria-label="向右滚动页签"
@click="scrollTabs(1)"
>
<ChevronRight />
</Button>
</div>
</template>
<style lang="scss" scoped>
/* ---- 页签栏（默认风格）：白卡内工具条，底部一条细分隔线（整卡唯一分隔） ---- */
.fms-tabs {
display: flex;
align-items: center;
flex-shrink: 0;
gap: 6px;
height: 40px;
padding: 0 12px;
overflow: hidden;
background: transparent;
border-bottom: 1px solid var(--fms-border);
}
.fms-tabs-arrow {
flex-shrink: 0;
width: 32px;
height: 32px;
padding: 0;
svg {
width: 16px;
height: 16px;
}
&:hover:not(:disabled) {
background: var(--fms-secondary-hover);
}
&:disabled {
opacity: 0.4;
cursor: not-allowed;
}
}
.fms-tabs-track {
display: flex;
flex: 1;
align-items: center;
gap: 6px;
min-width: 0;
overflow-x: auto;
overflow-y: hidden;
scrollbar-width: none;
&::-webkit-scrollbar {
display: none;
}
/* 右键菜单的 Dropdown 以 .popover-trigger 包裹每个页签；作为 flex 子项需禁止收缩，
对齐原 .fms-tab 的 flex-shrink:0 行为，避免页签被压窄 */
:deep(.popover-trigger) {
flex-shrink: 0;
}
}
.fms-tab {
position: relative;
display: inline-flex;
align-items: center;
gap: 6px;
flex-shrink: 0;
height: 28px;
padding: 0 10px;
border: 1px solid var(--fms-border);
border-radius: var(--fms-control-radius);
background: var(--fms-card);
color: var(--fms-text-secondary);
font-family: inherit;
font-size: 12px;
font-weight: 500;
line-height: 20px;
cursor: pointer;
user-select: none;
transition:
background 150ms ease,
border-color 150ms ease,
color 150ms ease;
&:hover {
border-color: var(--fms-text-secondary);
color: var(--fms-text);
}
&:focus-visible {
outline: 2px solid var(--fms-primary);
outline-offset: -2px;
}
&.is-active {
background: var(--fms-primary);
border-color: var(--fms-primary);
color: var(--fms-primary-text);
}
&.is-active:hover {
background: var(--fms-primary);
border-color: var(--fms-primary);
color: var(--fms-primary-text);
}
&.is-active .fms-tab-close {
color: color-mix(in srgb, var(--fms-primary-text) 85%, transparent);
&:hover {
background: color-mix(in srgb, var(--fms-primary-text) 22%, transparent);
color: var(--fms-primary-text);
}
}
}
.fms-tab-label {
max-width: 144px;
overflow: hidden;
text-overflow: ellipsis;
white-space: nowrap;
}
.fms-tab-close {
display: inline-flex;
align-items: center;
justify-content: center;
width: 16px;
height: 16px;
margin-right: -4px;
border-radius: 4px;
color: var(--fms-text-secondary);
transition:
background 150ms ease,
color 150ms ease;
svg {
width: 12px;
height: 12px;
}
&:hover {
background: color-mix(in srgb, var(--fms-text-secondary) 20%, transparent);
color: var(--fms-text);
}
}
</style>
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